64683210725 has 36 divisors (see below), whose sum is σ = 93418992900. Its totient is φ = 44298696960.

The previous prime is 64683210719. The next prime is 64683210749. The reversal of 64683210725 is 52701238646.

It can be written as a sum of positive squares in 6 ways, for example, as 694955044 + 63988255681 = 26362^2 + 252959^2 .

It is not a de Polignac number, because 64683210725 - 2²⁴ = 64666433509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 958391 + ... + 1023659.

It is an arithmetic number, because the mean of its divisors is an integer number (2594972025).

Almost surely, 2^64683210725 is an apocalyptic number.

It is an amenable number.

64683210725 is a deficient number, since it is larger than the sum of its proper divisors (28735782175).

64683210725 is a wasteful number, since it uses less digits than its factorization.

64683210725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66102 (or 66090 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 64683210725 in words is "sixty-four billion, six hundred eighty-three million, two hundred ten thousand, seven hundred twenty-five".